As a lab technician for 3M, Ms. Relph tests industrial masks. “The fact that people deny the science behind masks makes me even angrier,” she said. She recalled that a Senate colleague of her father’s had stopped by her family’s house, without a mask, while her father was in the hospital. “Point blank, he said, ‘I don’t think this is as serious as they’re telling us it is,’” Ms. Relph said. “My dad was dying. These are people that think they’re good, kind, compassionate people, and yet they don’t act that way.”